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Location:
Brisbane
Registered:
June 2003
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 18R vs 18RC Carb
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Sat, 19 June 2004 01:23
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Just having problems with the carbie on the daily driver - a 1975 Corona with an 18R.
Can pick up any number of carbs off an 18R-C for next to nothing, but I was wondering if they're actually the same. 18Rs are a bit tougher to find.
Anyone know if there's any difference?
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Location:
Canberra
Registered:
February 2004
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Re: 18R vs 18RC Carb
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Sat, 19 June 2004 01:40
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I dont think that the 18-r has the exhaust gas recirculator or air injection that the 18r-c has. I'm sure that an 18r-c carb will fit on your car and I run one without the air injection at teh moment but I dont know how good it will run without the EGR in operation, mayby a whole manifold change might be an option.
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Location:
Brisbane
Registered:
June 2003
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Re: 18R vs 18RC Carb
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Sat, 19 June 2004 02:23
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Wow, that is without a doubt the furthest I have ever received an answer from. Ireland!
Thanks. I might just grab an 18R-C carb from somewhere, strip them both and see how many bits from one I can fit on the other...
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Location:
Rocky Mountains, Canada
Registered:
May 2002
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Re: 18R vs 18RC Carb
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Sat, 19 June 2004 03:31
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Ever thought about cleaning up the old 18R carb.
I just pulled mine apart, cleaned everything and put it back together.
Works like new...
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Location:
Canberra
Registered:
December 2002
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Re: 18R vs 18RC Carb
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Sat, 19 June 2004 04:16
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I have a 18r-c carb with the auto choke buggered on it and a few manifolds if your intrested need to get rid of them for the price of postage and my time to walk to the post office.
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Location:
Canberra
Registered:
February 2004
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Re: 18R vs 18RC Carb
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Sat, 19 June 2004 12:54
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Yeah, I was in Canberra there for a while and now i'm back in Ireland, should be returning to Canberra pretty soon though so I can do a bit more work on my Ra40. Its a long way away, but i'm hopeing to raid some Irish scrap yards for old Celica bits before I go back to Australia.
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Location:
Perth
Registered:
May 2003
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Location:
Brisbane
Registered:
June 2003
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Re: 18R vs 18RC Carb
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Sun, 20 June 2004 21:39
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I'm going to try cleaning the one on there first, but yep, the Weber is also an option.
Where and how much is the main question?
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Location:
Canberra
Registered:
February 2004
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Re: 18R vs 18RC Carb
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Sun, 20 June 2004 21:49
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I was in a carbie center in Canberra and enquired about a carb swap. Based on a reconditioned webber, adaptor plate and aftermarket aircleaner, it was going to be $500 plus. Not exactly value for money. The problem that I ran into was that the arm on the choke shaft had worn away. I couldnt get this part from toyota or the carbie center so I had to weld a new piece of metal on the arm and off I went again , good as new.
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Location:
Rocky Mountains, Canada
Registered:
May 2002
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Re: 18R vs 18RC Carb
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Mon, 21 June 2004 04:31
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$500? Ouch.
I bought a 34ADM off a XF falcon at u-pull-it for $30, spent a few hrs cleaning it up & then made my own adapter plate from sheet aluminium.
Total cost was ~$80.
Oh... but then it took me quite a few more hrs to tune it properly.
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Location:
Adelaide
Registered:
January 2004
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Re: 18R vs 18RC Carb
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Mon, 21 June 2004 07:56
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I got a manual choke webber DGV off a 2l coritna. Should have been $400 but the guy at the wreckers didn't relaise it was a manual choke so I picked it up for $40.
Got an adapter plate, and made up an air cleaner housing so I could use the cheapest air filter I could find (Still good quality, but it a common whore one, so it's as common as a, well, commodore I guess!).
The car runs sweet as now, and I would never go back to an 18R or 18R-C carby if I were you.
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Location:
Perth
Registered:
May 2003
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Re: 18R vs 18RC Carb
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Tue, 22 June 2004 11:41
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My adapter cost me $30, the carb was about $30 and $20 for a rebuild kit (4 years ago).
$500 would have to be a professionally rebuilt carb. For a Weber it is not worth it as they are so easy to rebuild yourself.
Shop around. Probably find a Cortina in your local Trading Post where you could get a carby from cheap.
Manual chokes are a little hard to find, quite often the choke is simply removed altogether, but this makes cold starts a little difficult.
The cortina/escort carb is better than the falcon as it has larger venturis and more suitable jetting for the 18R, however falcon ones are probably easier to find.
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Location:
Rocky Mountains, Canada
Registered:
May 2002
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Re: 18R vs 18RC Carb
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Tue, 22 June 2004 16:41
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I dont think its worth the effort sticking to a manual choke.
My Weber 34ADM came with an electric choke which works brilliantly.
I can start it on the coldest or hottest day very easily and drive off with no problems at all.
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Location:
Brisbane
Registered:
June 2003
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Re: 18R vs 18RC Carb
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Sat, 26 June 2004 02:54
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Argh! Piece of crap.
Finally got around to fixing the bloody carb on there, and while it's not losing power any more, and the it's holding the mix ok, the idle's just not staying constant. 
It seems to randomly wander between about 600 and 800-1000 rpm, and I can't seem to settle it down. I originally thought it might be the fast idle was adjusted wrong, but it doesn't seem to make any difference no matter what I do to that...
Any ideas?
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Location:
Rocky Mountains, Canada
Registered:
May 2002
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Re: 18R vs 18RC Carb
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Sat, 26 June 2004 03:33
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Fast idle?
I cant remeber the 18R carb having a fast idle.
Are you sure that your ign timing is correct?
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Location:
Canberra
Registered:
February 2004
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Re: 18R vs 18RC Carb
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Sat, 26 June 2004 21:21
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If you can get your hands on a vacuum gauge you could get a reading off the carb and see how much air its drawing.It should read between 15 -17 on a guage. Theres might be an air leak somewhere. The fast idle only works when the carbie is cold so it wont affect it when its hot. If the vacuum is ok then I reckon that theres some internal problem with you carbie.
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Location:
Brisbane
Registered:
June 2003
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Re: 18R vs 18RC Carb
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Sun, 27 June 2004 00:28
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Come to the conclusion that it's sucking air somewhere - probably between the carb and manifold. Will make up a gasket and see if that makes a difference.
Ignition timing is perfect, just checked it the other day. Yes, the 18R definitely has a fast idle - I have the appropriate manual.
Having had a close look a the shoddy condition of the carb I'm considering going weber.
Any particular model Cortina best for the Weber? I'm assuming the 2L is the best option (I know nothing about Fords). Where's the best place to pick up an adaptor plate?
God, you can't half tell my other car has fuel injection.... 
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Location:
Perth
Registered:
May 2003
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Re: 18R vs 18RC Carb
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Sun, 27 June 2004 11:30
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Go the Weber and you will never go back!!!
All 4cyl cortinas ran the 2L, the escorts could have the a 2L or 1.6L. You are better off with a Weber off of a 2L cortina or escort as opposed to the 1.6L (IIRC they 1.6L has a smaller venturi size and jetting).
Most of the 2L cortinas and escorts that I have seen have had a water heated choke. These are great if the water heated part hasnt corroded off!!! I have seen some with a manual choke.
The falcon 4.1L Weber is probably easier to find but runs smaller venturis and different jetting (physically quite different to the 2L Weber too).
I picked up my adaptor plate through a Holley distributor. But any auto place that deals in Redline gear should be able to get you the adapter. Make sure you get the right one to fit your manifold as there are two different bolt patterns on the inlet manifold.
mmmm EFI 
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Location:
Brisbane
Registered:
June 2003
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Re: 18R vs 18RC Carb
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Tue, 03 August 2004 04:04
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Dragging my old thread back - have a weber 32/36 on the way from Adelaide.
Is there any funny stuff going on with throttle linkages or the fuel line to adapt to an 18R? And will the 3T 32/36 adaptor be the same as an 18R one? I can't seem to find a Redline catalogue anywhere, and Repco aren't exactly helpful...
Yeah, I know I'll find out when it gets here, but have to arrange some of this in advance.
Thanks.
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Location:
Perth
Registered:
May 2003
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Re: 18R vs 18RC Carb
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Tue, 03 August 2004 11:54
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Throttle linkage. Unbolt the old one off your Toyota carb, unbolt the current one on the Weber. Bolt on the Toyota linkage to the Weber carb (the right way up). You may need to bend the flat piece of steel that extends down off the linkage on the fire wall. Small mod, you will see what I mean when you get to it.
Fuel line. You will need to cut the end off your old fuel line (the tube nut has to go). Then you will need a short piece of fuel hose to go over the cut bundy tube (fuel line) to the carb plus a couple of clamps. There may also by a fuel return line on the carb too. You can either block this off or connect it to the fuel return line into the fuel tank.
As for the 3T... I am not sure...
I went to a distributor for Redline products as Veales (engine centre) couldnt help me.
Email Redline and find a supplier local to you:
http://www.redlineauto.com.au/index.html
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